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Federal Register / Vol. 86, No. 84 / Tuesday, May 4, 2021 / Rules and Regulations will treat such marked submissions as confidential under the FOIA, and they will not be placed in the public docket of this AD. Submissions containing CBI
should be sent to Mehdi Lamnyi, Aviation Safety Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803. Any commentary that the FAA receives which is not specifically
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designated as CBI will be placed in the public docket for this rulemaking.

adopt this rule without prior notice and comment, RFA analysis is not required.

Regulatory Flexibility Act The requirements of the Regulatory Flexibility Act RFA do not apply when an agency finds good cause pursuant to 5 U.S.C. 553 to adopt a rule without prior notice and comment. Because FAA
has determined that it has good cause to
Costs of Compliance The FAA estimates that this AD
affects 158 engines installed on airplanes of U.S. registry.
The FAA estimates the following costs to comply with this AD:

ESTIMATED COSTS
Action
Labor cost
Check for engine maintenance messages
Apply electrical power to PSS unit

0.5 work-hours $85 per hour = $42.50
15 work-hours $85 per hour = $1,275

The FAA estimates the following costs to do any necessary replacement that would be required based on the
Cost per product
Parts cost
results of the check for engine maintenance messages related to the pressure transducer. The agency has no
$0
0

$42.50
1,275

Cost on U.S.
operators $6,715
201,450

way of determining the number of aircraft that might need this replacement:

ON-CONDITION COSTS
Action
Labor cost
Replace PSS unit

1 work-hour $85 per hour = $85

Authority for This Rulemaking Title 49 of the United States Code specifies the FAAs authority to issue rules on aviation safety. Subtitle I, section 106, describes the authority of the FAA Administrator. Subtitle VII:
Aviation Programs describes in more detail the scope of the Agencys authority.
The FAA is issuing this rulemaking under the authority described in Subtitle VII, Part A, Subpart III, Section 44701: General requirements. Under that section, Congress charges the FAA
with promoting safe flight of civil aircraft in air commerce by prescribing regulations for practices, methods, and procedures the Administrator finds necessary for safety in air commerce.
This regulation is within the scope of that authority because it addresses an unsafe condition that is likely to exist or develop on products identified in this rulemaking action.

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This AD will not have federalism implications under Executive Order 13132. This AD will not have a substantial direct effect on the States, on the relationship between the national government and the States, or on the distribution of power and responsibilities among the various levels of government.
For the reasons discussed above, I
certify that this AD:

16:02 May 03, 2021

1 Is not a significant regulatory action under Executive Order 12866, and 2 Will not affect intrastate aviation in Alaska.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety.
The Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows:
PART 39AIRWORTHINESS
DIRECTIVES
1. The authority citation for part 39
continues to read as follows:

Authority: 49 U.S.C. 106g, 40113, 44701.
39.13

Amended
2. The FAA amends 39.13 by adding the following new airworthiness directive:

Regulatory Findings
VerDate Sep<11>2014

Parts cost
Jkt 253001

20211006 CFM International, S.A.:
Amendment 3921539; Docket No.
FAA20210346; Project Identifier AD
202100465E.
a Effective Date This airworthiness directive AD is effective May 10, 2021.
b Affected ADs None.

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$159,657

Cost per product $159,742

c Applicability This AD applies to CFM International S.A.
CFM LEAP1B21, 1B23, 1B25, 1B27, 1B28, 1B28B1, 1B28B2, 1B28B3, 1B28B2C, 1B28BBJ1, and 1B28BBJ2
model turbofan engines with a pressure subsystem PSS unit with a serial number S/N listed in Additional Information, Paragraph 6.A. Table 1 of CFM Service Bulletin SB LEAP1B7300003801A
930AD, Issue 00200, dated 20210425
SB LEAP1B730038, installed.
d Subject Joint Aircraft System Component JASC
Code 7600, Engine Controls.
e Unsafe Condition This AD was prompted by multiple reports of PSS unit faults due to pressure transducer corrosion following extended storage periods.
The FAA is issuing this AD to prevent erroneous pressure sensor signals that can impact engine thrust control. The unsafe condition, if not addressed, could result in loss of engine thrust control and reduced control of the airplane.
f Compliance Comply with this AD within the compliance times specified, unless already done.
g Required Actions 1 For an engine in service on the effective date of this AD that has accumulated fewer than 15 hours of electrical power applied to the PSS unit within the past 90 days, perform one of the following actions:
i Prior to each flight, perform a check for the engine maintenance messages listed in the Accomplishment Instructions, paragraph
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